//////////////////////////////////////////////////////////////////////////
//Copyright (c) 2011, linlin liu
//All rights reserved.
//
//Redistribution and use in source and binary forms, with or without
//modification, are permitted provided that the following conditions are met:
//* Redistributions of source code must retain the above copyright
//notice, this list of conditions and the following disclaimer.
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//notice, this list of conditions and the following disclaimer in the
//documentation and/or other materials provided with the distribution.
//* Neither the name of the <organization> nor the
//names of its contributors may be used to endorse or promote products
//derived from this software without specific prior written permission.
//
//THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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//////////////////////////////////////////////////////////////////////////

#include "amf0/amf0_numeric.h"
#include <sstream>
#include <boost/detail/endian.hpp>

amf::amf_numeric::amf_numeric()
    : m_val(0.0)
{
}

amf::amf_numeric::amf_numeric(double val)
    : m_val(val)
{
}

amf::AMF_TYPE amf::amf_numeric::get_type() const
{
    return AMF_TYPE_NUMERIC;
}

/************************************************************************/
/*                                                                      */
/************************************************************************/
void amf::amf_numeric::encode(char* const data) const
{
    char *buf = data;
    char *dPtr = (char *)&m_val;

#if defined(BOOST_LITTLE_ENDIAN)

    for (int i = 7; i >= 0; --i)
    {
        buf[i] = *dPtr;
        dPtr++;
    }

#elif BOOST_BIG_ENDIAN

    for (int i = 0; i <= 7; ++i)
    {
        buf[i] = *dPtr;
        dPtr++;
    }

#endif

}

/************************************************************************/
/*                                                                      */
/************************************************************************/
boost::int32_t amf::amf_numeric::decode(const char *data, boost::uint32_t quota)
{
    if (quota < get_size())
    {
        return AMF_DECODE_FAILED;
    }

    char *dPtr = (char *)&m_val;

#if defined(BOOST_LITTLE_ENDIAN)

    for (int i = 7; i >= 0; --i)
    {
        *dPtr = data[i];
        dPtr++;
    }

#else if defined(BOOST_BIG_ENDIAN)

    for (int i = 0; i <= 7; ++i)
    {
        *dPtr = data[i];
        dPtr++;
    }

#endif

    return get_size();
}

/************************************************************************/
/*                                                                      */
/************************************************************************/
const boost::uint32_t amf::amf_numeric::get_size() const
{
    return 8;
}

const double amf::amf_numeric::get_value() const
{
    return m_val;
}

/************************************************************************/
/*                                                                      */
/************************************************************************/
const std::string amf::amf_numeric::to_string() const
{
    std::ostringstream rt;

    rt << std::ios::fixed << m_val;

    return rt.str();
}